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> '93 960 Check Engine Light And Codes...anyone Help?, the '93 960's check engine light showed up the other day and I
docweedon
post Nov 3 2011, 11:58 AM
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Well, the '93 960's check engine light showed up the other day and I had a chance to pull the codes from the ODBI test block and received two codes. Was wondering if anyone can help decipher them and let me know if they are serious.

3-2-2 code - From what I have gathered it has something to do with the MAF sensor and a wire, ground perhaps? What do I need to do to check this further or do I need to replace the MAF sensor?

5-1-1 code - Long term fuel trim, idle. This one I don't know what to make. It comes up and a whole host of things. Intake/exhaust leak, EVAP, excessive fuel in engine oil, and the MAF sensor.

Anyone of experiences with these codes and how to deal with them? Aside from a rough idle and a surge at stop lights from time to time, the car runs great. Any input would be greatly appreciated.
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nrschaaf
post Nov 3 2011, 12:47 PM
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Code 3-2-2 refers to the burn-off hot wire in the MAF sensor. I'm not familiar with code 5-1-1, but concidering that it can refernce your MAF then I would start there.
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docweedon
post Nov 3 2011, 03:06 PM
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What is the burn off wire in the MAF and what does it do?
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danielm85948
post Nov 3 2011, 04:19 PM
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QUOTE (docweedon @ Nov 3 2011, 11:58 AM)
Well, the '93 960's check engine light showed up the other day and I had a chance to pull the codes from the ODBI test block and received two codes. Was wondering if anyone can help decipher them and let me know if they are serious.

3-2-2 code - From what I have gathered it has something to do with the MAF sensor and a wire, ground perhaps? What do I need to do to check this further or do I need to replace the MAF sensor?

5-1-1 code - Long term fuel trim, idle. This one I don't know what to make. It comes up and a whole host of things. Intake/exhaust leak, EVAP, excessive fuel in engine oil, and the MAF sensor.

Anyone of experiences with these codes and how to deal with them? Aside from a rough idle and a surge at stop lights from time to time, the car runs great. Any input would be greatly appreciated.

you can get a new MAF meter on Ebay for a $100 and clean the idle control valve with carb cleaner,as the piston inside can stick due to dirt, spray into both holes.
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docweedon
post Nov 3 2011, 04:32 PM
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Ok so more research I find the 511 code is "Adaptive oxygen sensor control-lean mixture at idle." @danielm85948, where is the idle control valve located? From reading, what you recommended to clean the idle control valve could do the trick.

**I disconnected the MAF sensor and the car ran good. No rough idle at stops. This leads me to believe that it is indeed the MAF going bad and needs to be replaced.

I have found a MAF on ebay used for about $100. I'm going to purchase that and see if it works. I don't think I need to take the car to the shop, but it is something I want to fix asap.
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danielm85948
post Nov 3 2011, 11:56 PM
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QUOTE (docweedon @ Nov 3 2011, 04:32 PM)
Ok so more research I find the 511 code is "Adaptive oxygen sensor control-lean mixture at idle." @danielm85948, where is the idle control valve located? From reading, what you recommended to clean the idle control valve could do the trick.

**I disconnected the MAF sensor and the car ran good. No rough idle at stops. This leads me to believe that it is indeed the MAF going bad and needs to be replaced.

I have found a MAF on ebay used for about $100. I'm going to purchase that and see if it works. I don't think I need to take the car to the shop, but it is something I want to fix asap.

just google idle control valve volvo 960 for details,should be about 10 inches under the throttle body,
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danielm85948
post Nov 3 2011, 11:57 PM
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QUOTE (docweedon @ Nov 3 2011, 04:32 PM)
Ok so more research I find the 511 code is "Adaptive oxygen sensor control-lean mixture at idle." @danielm85948, where is the idle control valve located? From reading, what you recommended to clean the idle control valve could do the trick.

**I disconnected the MAF sensor and the car ran good. No rough idle at stops. This leads me to believe that it is indeed the MAF going bad and needs to be replaced.

I have found a MAF on ebay used for about $100. I'm going to purchase that and see if it works. I don't think I need to take the car to the shop, but it is something I want to fix asap.

just google idle control valve volvo 960 for details,should be about 10 inches under the throttle body,this is your idle control valve
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